Home > Invertebrates > Bivalves > Hyotissa inermis

Updated 8/20/2025

Family Gryphaeidae

EAST ASIA / HAWAII

Hyotissa inermis

Sea Tiger wreck, Oahu, 85 feet

IMBRICATE OYSTER

A common fouling organism on smooth manmade objects at any depth.  Attains at least 2 inches, 50 mm.  It was accidentally introduced to Hawaii from the East China Sea.  Ostrea nobilis and Parahyotissa inermis are synonyms.